/*
 * This file is part of the KubeVirt project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Copyright The KubeVirt Authors.
 *
 */

package network

import (
	v1 "kubevirt.io/api/core/v1"

	"kubevirt.io/client-go/log"

	"kubevirt.io/kubevirt/pkg/virt-launcher/virtwrap/converter/vcpu"
)

const MultiQueueMaxQueues = uint32(256)

func NetworkQueuesCapacity(vmi *v1.VirtualMachineInstance) uint32 {
	if !isTrue(vmi.Spec.Domain.Devices.NetworkInterfaceMultiQueue) {
		return 0
	}

	cpuTopology := vcpu.GetCPUTopology(vmi)
	queueNumber := vcpu.CalculateRequestedVCPUs(cpuTopology)

	if queueNumber > MultiQueueMaxQueues {
		log.Log.V(3).Infof("Capped the number of queues to be the current maximum of tap device queues: %d", MultiQueueMaxQueues)
		queueNumber = MultiQueueMaxQueues
	}
	return queueNumber
}

func isTrue(networkInterfaceMultiQueue *bool) bool {
	return (networkInterfaceMultiQueue != nil) && (*networkInterfaceMultiQueue)
}
